CARTO® 3 System and Real Time Intracardiac Ultrasound

This study is purposed to measure "real world" acute procedural outcomes (procedural
efficiency and acute safety) associated with use of the CARTO® 3 System and real time
intracardiac ultrasound in a clinical setting in subjects with drug refractory recurrent
symptomatic paroxysmal AF.

Inclusion Criteria:

- Drug refractory, recurrent symptomatic paroxysmal AF

- Age 18 years or older

- Patients able and willing to provide written informed consent to participate in the
study and comply with study requirements

Exclusion Criteria:

- Atrial fibrillation secondary to electrolyte imbalance, thyroid disease, or
reversible or non-cardiac cause

- Previous ablation for atrial fibrillation

- AF episodes that last longer than 30 days

- Uncontrolled heart failure, or NYHA Class III or IV heart failure

- Documented intra-atrial thrombus or other abnormality on pre-ablation imaging

- Contraindication to anticoagulation

- Stroke, cardiac surgery, unstable angina, myocardial infarction or percutaneous
coronary intervention within the past 3 months

- Awaiting cardiac transplantation

- Heart disease for which corrective surgery is anticipated within 6 months

- Enrollment in other investigational drug or device study

- Subjects unwilling to comply with protocol or follow-up requirements

- Patients who are pregnant